I didn't mean the old parks are worthless. What I meant was that people who are excited about EPIC have probably been to US and IOA dozens of times. They want to see what is new at EPIC. And with the crowds, they'll need multiple days. I think that's the majority of people who want to visit EPIC in May/June/July.
We went to Universal Orlando last year, and Universal Hollywood this year. We want to see what's new at EPIC. And 'forcing' us to visit the parks we were just at for 2 days just to see EPIC for 1 is not what we want.
The ideal situation is to stay at Helios and visit the park multiple times. Why even stay at Helios at all if you need to bus to the other parks and don't get express passes at them?
And we cannot buy 1 day EPIC tickets right now. Nobody can. Tomorrow, we can't either, as we don't have APs as we only visit every other year.